#define _CRT_SECURE_NO_WARNINGS
#pragma warning(disable:6031)

#include <stdio.h>
#include <stdbool.h>
#include <limits.h>
#include <float.h>

int main()
{
	//printf("zhao\n\v jian");
	bool a = false;
	printf("%a\n", 12.0);
	printf("%A\n", 12.0);
	printf("%e\n", 12.0);
	printf("%E\n", 12.0);
	int b = 0;
	int* c = NULL;
	printf("zhao\n");
	printf("%n", c);
	printf("%d\n", b);

	return 0;
}